Article (Scientific journals)
Effects of exogenous fibrolytic enzymes on the ruminal fermentation of agro-industrial by-products
Abid, Khalil; Jabri, Jihene; Beckers, Yves et al.
2019In South African Journal of Animal Sciences, 49 (4), p. 612-618
Peer reviewed
 

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Keywords :
Almond hull; Feed additive; Grape pomace; Pomegranate peel
Abstract :
[en] This research was performed to evaluate the effects of increasing doses of exogenous fibrolytic enzymes (EFE), namely at 0 (control), 1 (low), 2 (medium) and 4 (high) μL/g dry matter (DM), on the ruminal fermentation of low-quality agro-industrial by-products, grape pomace, almond hull and pomegranate peel. For pomegranate peel, the addition of EFE increased gas production linearly from the immediately soluble fraction, and from the insoluble fraction, the potential of gas production (significant linear effect), organic matter digestibility and metabolizable energy. The highest doses were the most effective. As the doses increased, the effectiveness increased accordingly. Unlike pomegranate peel, EFE had a quadratic effect on the indices of almond hull, namely a significant response on gas production from the immediately soluble fraction, the insoluble fraction, potential of gas production, organic matter digestibility and metabolizable energy. The lowest dose was the most effective while the highest dose had inhibitory effects for gas indices, organic matter digestibility and metabolizable energy. On the other hand, this supplementation had no effect on the ruminal fermentation of grape pomace. This study indicates that the response to this feed additive was influenced by the dose, the structure of the substrate, and the interaction between dose and the substrate. Exogenous fibrolytic enzymes could enhance the use of almond hull and pomegranate peel in ruminant nutrition, and reduce their negative environmental impact. © 2019, South African Bureau for Scientific Publications.
Disciplines :
Animal production & animal husbandry
Author, co-author :
Abid, Khalil;  Food and Animal Nutrition Service, National School of Veterinary Medicine Sidi Thabet, University of Manouba, Tunisia, Institut Supérieur Agronomique de Chott-Mariem, University of Sousse, Tunisia
Jabri, Jihene;  Food and Animal Nutrition Service, National School of Veterinary Medicine Sidi Thabet, University of Manouba, Tunisia
Beckers, Yves  ;  Université de Liège - ULiège > Département GxABT > Ingénierie des productions animales et nutrition
Yaich, Hela;  Food and Animal Nutrition Service, National School of Veterinary Medicine Sidi Thabet, University of Manouba, Tunisia
Malek, Atef;  Food and Animal Nutrition Service, National School of Veterinary Medicine Sidi Thabet, University of Manouba, Tunisia
Rekhis, Jamel;  Food and Animal Nutrition Service, National School of Veterinary Medicine Sidi Thabet, University of Manouba, Tunisia
Kamoun, Jamel;  Food and Animal Nutrition Service, National School of Veterinary Medicine Sidi Thabet, University of Manouba, Tunisia
Language :
English
Title :
Effects of exogenous fibrolytic enzymes on the ruminal fermentation of agro-industrial by-products
Publication date :
2019
Journal title :
South African Journal of Animal Sciences
ISSN :
0375-1589
Publisher :
South African Bureau for Scientific Publications
Volume :
49
Issue :
4
Pages :
612-618
Peer reviewed :
Peer reviewed
Available on ORBi :
since 13 March 2020

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